I'm not vouching for JacksClub here, but you need to do your own research and check carefully the accuser's evidences before making up your mind.
Reviews and ratings can be faked and manipulated. As I said, don't trust everything you read online,make your own mind!
I have lost my confidence on trust pilot recently as i have seen some positive feedback about some sites when actually they are not so good ones. Trust pilot have gained some name in the industry but if they fail to control these paid reviews phenomenon, they may actually lose the trust.
The best way to know about any gambling site is to watch the discussions on their ANN thread. You will usually find better feedback here on bitcointalk about the gambling site as compared to any other platform.
Nah don't give a shit on review site since they can now be manipulated if there's money involve. Since they can be use as part of marketing so I guess we can't rely on them right now especially if we want to get reliable information about the casino status. This forum is somehow the best place to go if seeking reliable feedbacks since we can read people ideas and opinion that they share here. But there is one particular site catching up my attention and that is Btcgosu since so far they are doing on this criteria.